“I’m certainly more and more to the conclusion that Iraq has, they maintained（断言）, destroy

“I’m certainly more and more to the conclusion that Iraq has, they maintained（断言）, destroyed almost all of they had in the summer of 1991.” Bill said.
A. which, what
B. as, which
C. as, that
D. as, what

A. which, whatB. as, whichC. as, that(答案→)D. as, what解析：第一空是考查定语从句，先行词是the conclusion，从句 they maintained（断言），意为：正如他们所断言的，要用as，正如，正像；介词of后是宾语从句，且句中缺少had的宾语，要用what。选D.

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